What I think about this is Nexon created a higher tier of bad guys before actually finishing off any of the first story

It'd be fine if the new story elements they throw out ever felt...planned or a piece of something bigger, but it's all really felt duct-taped recently. "Oh Luminous? He uh...he was camping around or something" "Oh Demon Slayer? We may have forgot to mention that he was super super important to the original defeat of the Black Mage until...now, sorry" "Why is this class' home town put there? Well uh...okay we have no excuse for this, we couldn't find any logical place to put it".